syzbot

INFO: task kworker/0:0:8 blocked for more than 143 seconds.
      Not tainted 6.7.0-rc2-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/0:0     state:D stack:21680 pid:8     tgid:8     ppid:2      flags:0x00004000
Workqueue: usb_hub_wq hub_event
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5376 [inline]
 __schedule+0x1961/0x4ab0 kernel/sched/core.c:6688
 __schedule_loop kernel/sched/core.c:6763 [inline]
 schedule+0x149/0x260 kernel/sched/core.c:6778
 schedule_timeout+0xb0/0x300 kernel/time/timer.c:2143
 do_wait_for_common kernel/sched/completion.c:95 [inline]
 __wait_for_common kernel/sched/completion.c:116 [inline]
 wait_for_common kernel/sched/completion.c:127 [inline]
 wait_for_completion+0x354/0x620 kernel/sched/completion.c:148
 r871xu_dev_remove+0x72/0x440 drivers/staging/rtl8712/usb_intf.c:594
 usb_unbind_interface+0x1d1/0x840 drivers/usb/core/driver.c:458
 device_remove drivers/base/dd.c:569 [inline]
 __device_release_driver drivers/base/dd.c:1272 [inline]
 device_release_driver_internal+0x4f9/0x7a0 drivers/base/dd.c:1295
 bus_remove_device+0x341/0x410 drivers/base/bus.c:574
 device_del+0x579/0xa20 drivers/base/core.c:3814
 usb_disable_device+0x3bf/0x850 drivers/usb/core/message.c:1416
 usb_disconnect+0x340/0x950 drivers/usb/core/hub.c:2260
 hub_port_connect drivers/usb/core/hub.c:5303 [inline]
 hub_port_connect_change drivers/usb/core/hub.c:5603 [inline]
 port_event drivers/usb/core/hub.c:5763 [inline]
 hub_event+0x2094/0x50a0 drivers/usb/core/hub.c:5845
 process_one_work kernel/workqueue.c:2630 [inline]
 process_scheduled_works+0x90f/0x1420 kernel/workqueue.c:2703
 worker_thread+0xa5f/0x1000 kernel/workqueue.c:2784
 kthread+0x2d3/0x370 kernel/kthread.c:388
 ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:242
 </TASK>
INFO: task kworker/0:1:9 blocked for more than 143 seconds.
      Not tainted 6.7.0-rc2-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/0:1     state:D stack:21680 pid:9     tgid:9     ppid:2      flags:0x00004000
Workqueue: usb_hub_wq hub_event
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5376 [inline]
 __schedule+0x1961/0x4ab0 kernel/sched/core.c:6688
 __schedule_loop kernel/sched/core.c:6763 [inline]
 schedule+0x149/0x260 kernel/sched/core.c:6778
 schedule_timeout+0xb0/0x300 kernel/time/timer.c:2143
 do_wait_for_common kernel/sched/completion.c:95 [inline]
 __wait_for_common kernel/sched/completion.c:116 [inline]
 wait_for_common kernel/sched/completion.c:127 [inline]
 wait_for_completion+0x354/0x620 kernel/sched/completion.c:148
 r871xu_dev_remove+0x72/0x440 drivers/staging/rtl8712/usb_intf.c:594
 usb_unbind_interface+0x1d1/0x840 drivers/usb/core/driver.c:458
 device_remove drivers/base/dd.c:569 [inline]
 __device_release_driver drivers/base/dd.c:1272 [inline]
 device_release_driver_internal+0x4f9/0x7a0 drivers/base/dd.c:1295
 bus_remove_device+0x341/0x410 drivers/base/bus.c:574
 device_del+0x579/0xa20 drivers/base/core.c:3814
 usb_disable_device+0x3bf/0x850 drivers/usb/core/message.c:1416
 usb_disconnect+0x340/0x950 drivers/usb/core/hub.c:2260
 hub_port_connect drivers/usb/core/hub.c:5303 [inline]
 hub_port_connect_change drivers/usb/core/hub.c:5603 [inline]
 port_event drivers/usb/core/hub.c:5763 [inline]
 hub_event+0x2094/0x50a0 drivers/usb/core/hub.c:5845
 process_one_work kernel/workqueue.c:2630 [inline]
 process_scheduled_works+0x90f/0x1420 kernel/workqueue.c:2703
 worker_thread+0xa5f/0x1000 kernel/workqueue.c:2784
 kthread+0x2d3/0x370 kernel/kthread.c:388
 ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:242
 </TASK>
INFO: task kworker/1:0:23 blocked for more than 143 seconds.
      Not tainted 6.7.0-rc2-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/1:0     state:D stack:21680 pid:23    tgid:23    ppid:2      flags:0x00004000
Workqueue: usb_hub_wq hub_event
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5376 [inline]
 __schedule+0x1961/0x4ab0 kernel/sched/core.c:6688
 __schedule_loop kernel/sched/core.c:6763 [inline]
 schedule+0x149/0x260 kernel/sched/core.c:6778
 schedule_timeout+0xb0/0x300 kernel/time/timer.c:2143
 do_wait_for_common kernel/sched/completion.c:95 [inline]
 __wait_for_common kernel/sched/completion.c:116 [inline]
 wait_for_common kernel/sched/completion.c:127 [inline]
 wait_for_completion+0x354/0x620 kernel/sched/completion.c:148
 r871xu_dev_remove+0x72/0x440 drivers/staging/rtl8712/usb_intf.c:594
 usb_unbind_interface+0x1d1/0x840 drivers/usb/core/driver.c:458
 device_remove drivers/base/dd.c:569 [inline]
 __device_release_driver drivers/base/dd.c:1272 [inline]
 device_release_driver_internal+0x4f9/0x7a0 drivers/base/dd.c:1295
 bus_remove_device+0x341/0x410 drivers/base/bus.c:574
 device_del+0x579/0xa20 drivers/base/core.c:3814
 usb_disable_device+0x3bf/0x850 drivers/usb/core/message.c:1416
 usb_disconnect+0x340/0x950 drivers/usb/core/hub.c:2260
 hub_port_connect drivers/usb/core/hub.c:5303 [inline]
 hub_port_connect_change drivers/usb/core/hub.c:5603 [inline]
 port_event drivers/usb/core/hub.c:5763 [inline]
 hub_event+0x2094/0x50a0 drivers/usb/core/hub.c:5845
 process_one_work kernel/workqueue.c:2630 [inline]
 process_scheduled_works+0x90f/0x1420 kernel/workqueue.c:2703
 worker_thread+0xa5f/0x1000 kernel/workqueue.c:2784
 kthread+0x2d3/0x370 kernel/kthread.c:388
 ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:242
 </TASK>
INFO: task kworker/1:1:27 blocked for more than 144 seconds.
      Not tainted 6.7.0-rc2-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/1:1     state:D stack:17656 pid:27    tgid:27    ppid:2      flags:0x00004000
Workqueue: events_power_efficient crda_timeout_work
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5376 [inline]
 __schedule+0x1961/0x4ab0 kernel/sched/core.c:6688
 __schedule_loop kernel/sched/core.c:6763 [inline]
 schedule+0x149/0x260 kernel/sched/core.c:6778
 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:6835
 __mutex_lock_common kernel/locking/mutex.c:679 [inline]
 __mutex_lock+0x6a3/0xd60 kernel/locking/mutex.c:747
 crda_timeout_work+0x15/0x50 net/wireless/reg.c:538
 process_one_work kernel/workqueue.c:2630 [inline]
 process_scheduled_works+0x90f/0x1420 kernel/workqueue.c:2703
 worker_thread+0xa5f/0x1000 kernel/workqueue.c:2784
 kthread+0x2d3/0x370 kernel/kthread.c:388
 ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:242
 </TASK>
INFO: task kworker/0:2:780 blocked for more than 144 seconds.
      Not tainted 6.7.0-rc2-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/0:2     state:D stack:21240 pid:780   tgid:780   ppid:2      flags:0x00004000
Workqueue: usb_hub_wq hub_event
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5376 [inline]
 __schedule+0x1961/0x4ab0 kernel/sched/core.c:6688
 __schedule_loop kernel/sched/core.c:6763 [inline]
 schedule+0x149/0x260 kernel/sched/core.c:6778
 schedule_timeout+0xb0/0x300 kernel/time/timer.c:2143
 do_wait_for_common kernel/sched/completion.c:95 [inline]
 __wait_for_common kernel/sched/completion.c:116 [inline]
 wait_for_common kernel/sched/completion.c:127 [inline]
 wait_for_completion+0x354/0x620 kernel/sched/completion.c:148
 r871xu_dev_remove+0x72/0x440 drivers/staging/rtl8712/usb_intf.c:594
 usb_unbind_interface+0x1d1/0x840 drivers/usb/core/driver.c:458
 device_remove drivers/base/dd.c:569 [inline]
 __device_release_driver drivers/base/dd.c:1272 [inline]
 device_release_driver_internal+0x4f9/0x7a0 drivers/base/dd.c:1295
 bus_remove_device+0x341/0x410 drivers/base/bus.c:574
 device_del+0x579/0xa20 drivers/base/core.c:3814
 usb_disable_device+0x3bf/0x850 drivers/usb/core/message.c:1416
 usb_disconnect+0x340/0x950 drivers/usb/core/hub.c:2260
 hub_port_connect drivers/usb/core/hub.c:5303 [inline]
 hub_port_connect_change drivers/usb/core/hub.c:5603 [inline]
 port_event drivers/usb/core/hub.c:5763 [inline]
 hub_event+0x2094/0x50a0 drivers/usb/core/hub.c:5845
 process_one_work kernel/workqueue.c:2630 [inline]
 process_scheduled_works+0x90f/0x1420 kernel/workqueue.c:2703
 worker_thread+0xa5f/0x1000 kernel/workqueue.c:2784
 kthread+0x2d3/0x370 kernel/kthread.c:388
 ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:242
 </TASK>
INFO: task kworker/1:3:5068 blocked for more than 144 seconds.
      Not tainted 6.7.0-rc2-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/1:3     state:D stack:21680 pid:5068  tgid:5068  ppid:2      flags:0x00004000
Workqueue: usb_hub_wq hub_event
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5376 [inline]
 __schedule+0x1961/0x4ab0 kernel/sched/core.c:6688
 __schedule_loop kernel/sched/core.c:6763 [inline]
 schedule+0x149/0x260 kernel/sched/core.c:6778
 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:6835
 __mutex_lock_common kernel/locking/mutex.c:679 [inline]
 __mutex_lock+0x6a3/0xd60 kernel/locking/mutex.c:747
 unregister_netdev+0x12/0x30 net/core/dev.c:11058
 r871xu_dev_remove+0xae/0x440 drivers/staging/rtl8712/usb_intf.c:596
 usb_unbind_interface+0x1d1/0x840 drivers/usb/core/driver.c:458
 device_remove drivers/base/dd.c:569 [inline]
 __device_release_driver drivers/base/dd.c:1272 [inline]
 device_release_driver_internal+0x4f9/0x7a0 drivers/base/dd.c:1295
 bus_remove_device+0x341/0x410 drivers/base/bus.c:574
 device_del+0x579/0xa20 drivers/base/core.c:3814
 usb_disable_device+0x3bf/0x850 drivers/usb/core/message.c:1416
 usb_disconnect+0x340/0x950 drivers/usb/core/hub.c:2260
 hub_port_connect drivers/usb/core/hub.c:5303 [inline]
 hub_port_connect_change drivers/usb/core/hub.c:5603 [inline]
 port_event drivers/usb/core/hub.c:5763 [inline]
 hub_event+0x2094/0x50a0 drivers/usb/core/hub.c:5845
 process_one_work kernel/workqueue.c:2630 [inline]
 process_scheduled_works+0x90f/0x1420 kernel/workqueue.c:2703
 worker_thread+0xa5f/0x1000 kernel/workqueue.c:2784
 kthread+0x2d3/0x370 kernel/kthread.c:388
 ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:242
 </TASK>
INFO: task kworker/1:4:5069 blocked for more than 145 seconds.
      Not tainted 6.7.0-rc2-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/1:4     state:D stack:20760 pid:5069  tgid:5069  ppid:2      flags:0x00004000
Workqueue: usb_hub_wq hub_event
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5376 [inline]
 __schedule+0x1961/0x4ab0 kernel/sched/core.c:6688
 __schedule_loop kernel/sched/core.c:6763 [inline]
 schedule+0x149/0x260 kernel/sched/core.c:6778
 schedule_timeout+0xb0/0x300 kernel/time/timer.c:2143
 do_wait_for_common kernel/sched/completion.c:95 [inline]
 __wait_for_common kernel/sched/completion.c:116 [inline]
 wait_for_common kernel/sched/completion.c:127 [inline]
 wait_for_completion+0x354/0x620 kernel/sched/completion.c:148
 r871xu_dev_remove+0x72/0x440 drivers/staging/rtl8712/usb_intf.c:594
 usb_unbind_interface+0x1d1/0x840 drivers/usb/core/driver.c:458
 device_remove drivers/base/dd.c:569 [inline]
 __device_release_driver drivers/base/dd.c:1272 [inline]
 device_release_driver_internal+0x4f9/0x7a0 drivers/base/dd.c:1295
 bus_remove_device+0x341/0x410 drivers/base/bus.c:574
 device_del+0x579/0xa20 drivers/base/core.c:3814
 usb_disable_device+0x3bf/0x850 drivers/usb/core/message.c:1416
 usb_disconnect+0x340/0x950 drivers/usb/core/hub.c:2260
 hub_port_connect drivers/usb/core/hub.c:5303 [inline]
 hub_port_connect_change drivers/usb/core/hub.c:5603 [inline]
 port_event drivers/usb/core/hub.c:5763 [inline]
 hub_event+0x2094/0x50a0 drivers/usb/core/hub.c:5845
 process_one_work kernel/workqueue.c:2630 [inline]
 process_scheduled_works+0x90f/0x1420 kernel/workqueue.c:2703
 worker_thread+0xa5f/0x1000 kernel/workqueue.c:2784
 kthread+0x2d3/0x370 kernel/kthread.c:388
 ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:242
 </TASK>

Showing all locks held in the system:
5 locks held by kworker/0:0/8:
 #0: ffff888015257538 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:2605 [inline]
 #0: ffff888015257538 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_scheduled_works+0x825/0x1420 kernel/workqueue.c:2703
 #1: ffffc900000d7d20 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:2605 [inline]
 #1: ffffc900000d7d20 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_scheduled_works+0x825/0x1420 kernel/workqueue.c:2703
 #2: ffff888142f56190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:992 [inline]
 #2: ffff888142f56190 (&dev->mutex){....}-{3:3}, at: hub_event+0x1fe/0x50a0 drivers/usb/core/hub.c:5791
 #3: ffff888018f89190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:992 [inline]
 #3: ffff888018f89190 (&dev->mutex){....}-{3:3}, at: usb_disconnect+0x103/0x950 drivers/usb/core/hub.c:2251
 #4: ffff88807e96a160 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:992 [inline]
 #4: ffff88807e96a160 (&dev->mutex){....}-{3:3}, at: __device_driver_lock drivers/base/dd.c:1095 [inline]
 #4: ffff88807e96a160 (&dev->mutex){....}-{3:3}, at: device_release_driver_internal+0xce/0x7a0 drivers/base/dd.c:1292
5 locks held by kworker/0:1/9:
 #0: ffff888015257538 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:2605 [inline]
 #0: ffff888015257538 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_scheduled_works+0x825/0x1420 kernel/workqueue.c:2703
 #1: ffffc900000e7d20 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:2605 [inline]
 #1: ffffc900000e7d20 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_scheduled_works+0x825/0x1420 kernel/workqueue.c:2703
 #2: ffff888142f26190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:992 [inline]
 #2: ffff888142f26190 (&dev->mutex){....}-{3:3}, at: hub_event+0x1fe/0x50a0 drivers/usb/core/hub.c:5791
 #3: ffff88801a3c6190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:992 [inline]
 #3: ffff88801a3c6190 (&dev->mutex){....}-{3:3}, at: usb_disconnect+0x103/0x950 drivers/usb/core/hub.c:2251
 #4: ffff88801ed89160 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:992 [inline]
 #4: ffff88801ed89160 (&dev->mutex){....}-{3:3}, at: __device_driver_lock drivers/base/dd.c:1095 [inline]
 #4: ffff88801ed89160 (&dev->mutex){....}-{3:3}, at: device_release_driver_internal+0xce/0x7a0 drivers/base/dd.c:1292
5 locks held by kworker/1:0/23:
 #0: ffff888015257538 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:2605 [inline]
 #0: ffff888015257538 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_scheduled_works+0x825/0x1420 kernel/workqueue.c:2703
 #1: ffffc900001d7d20 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:2605 [inline]
 #1: ffffc900001d7d20 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_scheduled_works+0x825/0x1420 kernel/workqueue.c:2703
 #2: ffff888020466190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:992 [inline]
 #2: ffff888020466190 (&dev->mutex){....}-{3:3}, at: hub_event+0x1fe/0x50a0 drivers/usb/core/hub.c:5791
 #3: ffff88807a672190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:992 [inline]
 #3: ffff88807a672190 (&dev->mutex){....}-{3:3}, at: usb_disconnect+0x103/0x950 drivers/usb/core/hub.c:2251
 #4: ffff88801ed8b160 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:992 [inline]
 #4: ffff88801ed8b160 (&dev->mutex){....}-{3:3}, at: __device_driver_lock drivers/base/dd.c:1095 [inline]
 #4: ffff88801ed8b160 (&dev->mutex){....}-{3:3}, at: device_release_driver_internal+0xce/0x7a0 drivers/base/dd.c:1292
3 locks held by kworker/1:1/27:
 #0: ffff888012c72138 ((wq_completion)events_power_efficient){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:2605 [inline]
 #0: ffff888012c72138 ((wq_completion)events_power_efficient){+.+.}-{0:0}, at: process_scheduled_works+0x825/0x1420 kernel/workqueue.c:2703
 #1: ffffc90000a2fd20 ((crda_timeout).work){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:2605 [inline]
 #1: ffffc90000a2fd20 ((crda_timeout).work){+.+.}-{0:0}, at: process_scheduled_works+0x825/0x1420 kernel/workqueue.c:2703
 #2: ffffffff8eb35ec8 (rtnl_mutex){+.+.}-{3:3}, at: crda_timeout_work+0x15/0x50 net/wireless/reg.c:538
1 lock held by khungtaskd/29:
 #0: ffffffff8d92d060 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:301 [inline]
 #0: ffffffff8d92d060 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:747 [inline]
 #0: ffffffff8d92d060 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6613
5 locks held by kworker/0:2/780:
 #0: ffff888015257538 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:2605 [inline]
 #0: ffff888015257538 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_scheduled_works+0x825/0x1420 kernel/workqueue.c:2703
 #1: ffffc9000469fd20 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:2605 [inline]
 #1: ffffc9000469fd20 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_scheduled_works+0x825/0x1420 kernel/workqueue.c:2703
 #2: ffff8880203ee190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:992 [inline]
 #2: ffff8880203ee190 (&dev->mutex){....}-{3:3}, at: hub_event+0x1fe/0x50a0 drivers/usb/core/hub.c:5791
 #3: ffff888014e87190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:992 [inline]
 #3: ffff888014e87190 (&dev->mutex){....}-{3:3}, at: usb_disconnect+0x103/0x950 drivers/usb/core/hub.c:2251
 #4: ffff888018f88160 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:992 [inline]
 #4: ffff888018f88160 (&dev->mutex){....}-{3:3}, at: __device_driver_lock drivers/base/dd.c:1095 [inline]
 #4: ffff888018f88160 (&dev->mutex){....}-{3:3}, at: device_release_driver_internal+0xce/0x7a0 drivers/base/dd.c:1292
3 locks held by kworker/1:2/923:
 #0: ffff888012c70d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:2605 [inline]
 #0: ffff888012c70d38 ((wq_completion)events){+.+.}-{0:0}, at: process_scheduled_works+0x825/0x1420 kernel/workqueue.c:2703
 #1: ffffc90004877d20 ((work_completion)(&fw_work->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:2605 [inline]
 #1: ffffc90004877d20 ((work_completion)(&fw_work->work)){+.+.}-{0:0}, at: process_scheduled_works+0x825/0x1420 kernel/workqueue.c:2703
 #2: ffffffff8eb35ec8 (rtnl_mutex){+.+.}-{3:3}, at: register_netdev+0x13/0x50 net/core/dev.c:10294
2 locks held by dhcpcd/4725:
 #0: ffffffff8eb35ec8 (rtnl_mutex){+.+.}-{3:3}, at: devinet_ioctl+0x2ce/0x1bc0 net/ipv4/devinet.c:1091
 #1: ffff88801c60cdf0 (&padapter->mutex_start){+.+.}-{3:3}, at: netdev_open+0x35/0x720 drivers/staging/rtl8712/os_intfs.c:392
2 locks held by getty/4809:
 #0: ffff8880268960a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
 #1: ffffc900015c72f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6b4/0x1e10 drivers/tty/n_tty.c:2201
6 locks held by kworker/1:3/5068:
 #0: ffff888015257538 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:2605 [inline]
 #0: ffff888015257538 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_scheduled_works+0x825/0x1420 kernel/workqueue.c:2703
 #1: ffffc90003dffd20 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:2605 [inline]
 #1: ffffc90003dffd20 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_scheduled_works+0x825/0x1420 kernel/workqueue.c:2703
 #2: ffff888142f0e190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:992 [inline]
 #2: ffff888142f0e190 (&dev->mutex){....}-{3:3}, at: hub_event+0x1fe/0x50a0 drivers/usb/core/hub.c:5791
 #3: ffff88807318b190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:992 [inline]
 #3: ffff88807318b190 (&dev->mutex){....}-{3:3}, at: usb_disconnect+0x103/0x950 drivers/usb/core/hub.c:2251
 #4: ffff8880252f4160 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:992 [inline]
 #4: ffff8880252f4160 (&dev->mutex){....}-{3:3}, at: __device_driver_lock drivers/base/dd.c:1095 [inline]
 #4: ffff8880252f4160 (&dev->mutex){....}-{3:3}, at: device_release_driver_internal+0xce/0x7a0 drivers/base/dd.c:1292
 #5: ffffffff8eb35ec8 (rtnl_mutex){+.+.}-{3:3}, at: unregister_netdev+0x12/0x30 net/core/dev.c:11058
5 locks held by kworker/1:4/5069:
 #0: ffff888015257538 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:2605 [inline]
 #0: ffff888015257538 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_scheduled_works+0x825/0x1420 kernel/workqueue.c:2703
 #1: ffffc90003e0fd20 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:2605 [inline]
 #1: ffffc90003e0fd20 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_scheduled_works+0x825/0x1420 kernel/workqueue.c:2703
 #2: ffff888142f3e190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:992 [inline]
 #2: ffff888142f3e190 (&dev->mutex){....}-{3:3}, at: hub_event+0x1fe/0x50a0 drivers/usb/core/hub.c:5791
 #3: ffff88801a39b190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:992 [inline]
 #3: ffff88801a39b190 (&dev->mutex){....}-{3:3}, at: usb_disconnect+0x103/0x950 drivers/usb/core/hub.c:2251
 #4: ffff88807376a160 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:992 [inline]
 #4: ffff88807376a160 (&dev->mutex){....}-{3:3}, at: __device_driver_lock drivers/base/dd.c:1095 [inline]
 #4: ffff88807376a160 (&dev->mutex){....}-{3:3}, at: device_release_driver_internal+0xce/0x7a0 drivers/base/dd.c:1292
3 locks held by kworker/0:3/5071:
 #0: ffff888012c70d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:2605 [inline]
 #0: ffff888012c70d38 ((wq_completion)events){+.+.}-{0:0}, at: process_scheduled_works+0x825/0x1420 kernel/workqueue.c:2703
 #1: ffffc90003e1fd20 ((work_completion)(&fw_work->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:2605 [inline]
 #1: ffffc90003e1fd20 ((work_completion)(&fw_work->work)){+.+.}-{0:0}, at: process_scheduled_works+0x825/0x1420 kernel/workqueue.c:2703
 #2: ffffffff8eb35ec8 (rtnl_mutex){+.+.}-{3:3}, at: register_netdev+0x13/0x50 net/core/dev.c:10294
3 locks held by kworker/0:4/5074:
 #0: ffff888012c70d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:2605 [inline]
 #0: ffff888012c70d38 ((wq_completion)events){+.+.}-{0:0}, at: process_scheduled_works+0x825/0x1420 kernel/workqueue.c:2703
 #1: ffffc90003e5fd20 ((work_completion)(&fw_work->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:2605 [inline]
 #1: ffffc90003e5fd20 ((work_completion)(&fw_work->work)){+.+.}-{0:0}, at: process_scheduled_works+0x825/0x1420 kernel/workqueue.c:2703
 #2: ffffffff8eb35ec8 (rtnl_mutex){+.+.}-{3:3}, at: register_netdev+0x13/0x50 net/core/dev.c:10294
3 locks held by kworker/1:6/5083:
 #0: ffff888012c70d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:2605 [inline]
 #0: ffff888012c70d38 ((wq_completion)events){+.+.}-{0:0}, at: process_scheduled_works+0x825/0x1420 kernel/workqueue.c:2703
 #1: ffffc90003d4fd20 ((work_completion)(&fw_work->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:2605 [inline]
 #1: ffffc90003d4fd20 ((work_completion)(&fw_work->work)){+.+.}-{0:0}, at: process_scheduled_works+0x825/0x1420 kernel/workqueue.c:2703
 #2: ffffffff8eb35ec8 (rtnl_mutex){+.+.}-{3:3}, at: register_netdev+0x13/0x50 net/core/dev.c:10294
3 locks held by kworker/0:5/5085:
 #0: ffff888012c70d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:2605 [inline]
 #0: ffff888012c70d38 ((wq_completion)events){+.+.}-{0:0}, at: process_scheduled_works+0x825/0x1420 kernel/workqueue.c:2703
 #1: ffffc90003ddfd20 ((work_completion)(&fw_work->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:2605 [inline]
 #1: ffffc90003ddfd20 ((work_completion)(&fw_work->work)){+.+.}-{0:0}, at: process_scheduled_works+0x825/0x1420 kernel/workqueue.c:2703
 #2: ffffffff8eb35ec8 (rtnl_mutex){+.+.}-{3:3}, at: register_netdev+0x13/0x50 net/core/dev.c:10294
3 locks held by kworker/0:6/5086:
 #0: ffff88814aec9d38 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:2605 [inline]
 #0: ffff88814aec9d38 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_scheduled_works+0x825/0x1420 kernel/workqueue.c:2703
 #1: ffffc90003ee7d20 ((work_completion)(&(&net->ipv6.addr_chk_work)->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:2605 [inline]
 #1: ffffc90003ee7d20 ((work_completion)(&(&net->ipv6.addr_chk_work)->work)){+.+.}-{0:0}, at: process_scheduled_works+0x825/0x1420 kernel/workqueue.c:2703
 #2: ffffffff8eb35ec8 (rtnl_mutex){+.+.}-{3:3}, at: addrconf_verify_work+0x19/0x30 net/ipv6/addrconf.c:4679
3 locks held by kworker/1:7/5095:
 #0: ffff888012c72138 ((wq_completion)events_power_efficient){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:2605 [inline]
 #0: ffff888012c72138 ((wq_completion)events_power_efficient){+.+.}-{0:0}, at: process_scheduled_works+0x825/0x1420 kernel/workqueue.c:2703
 #1: ffffc90003f57d20 ((reg_check_chans).work){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:2605 [inline]
 #1: ffffc90003f57d20 ((reg_check_chans).work){+.+.}-{0:0}, at: process_scheduled_works+0x825/0x1420 kernel/workqueue.c:2703
 #2: ffffffff8eb35ec8 (rtnl_mutex){+.+.}-{3:3}, at: reg_check_chans_work+0x91/0xe40 net/wireless/reg.c:2473

=============================================

NMI backtrace for cpu 1
CPU: 1 PID: 29 Comm: khungtaskd Not tainted 6.7.0-rc2-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/10/2023
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x1e7/0x2d0 lib/dump_stack.c:106
 nmi_cpu_backtrace+0x498/0x4d0 lib/nmi_backtrace.c:113
 nmi_trigger_cpumask_backtrace+0x198/0x310 lib/nmi_backtrace.c:62
 trigger_all_cpu_backtrace include/linux/nmi.h:160 [inline]
 check_hung_uninterruptible_tasks kernel/hung_task.c:222 [inline]
 watchdog+0xfaf/0xff0 kernel/hung_task.c:379
 kthread+0x2d3/0x370 kernel/kthread.c:388
 ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:242
 </TASK>
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 4493 Comm: syslogd Not tainted 6.7.0-rc2-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/10/2023
RIP: 0010:__lock_acquire+0xc87/0x1fd0 kernel/locking/lockdep.c:5109
Code: bf 00 00 00 00 00 fc ff df 48 0f a3 1d b2 0b 70 0f 0f 83 f2 08 00 00 49 8d 9d b0 0a 00 00 48 89 d8 48 c1 e8 03 48 89 44 24 38 <80> 3c 38 00 74 12 48 89 df e8 9b 20 7d 00 48 bf 00 00 00 00 00 fc
RSP: 0018:ffffc9000302f4b0 EFLAGS: 00000806
RAX: 1ffff1100f7d1c7e RBX: ffff88807be8e3f0 RCX: ffffffff816d379c
RDX: 0000000000000000 RSI: 0000000000000008 RDI: dffffc0000000000
RBP: ffff88807be8e428 R08: ffffffff90dd4397 R09: 1ffffffff21ba872
R10: dffffc0000000000 R11: fffffbfff21ba873 R12: 0000000000000001
R13: ffff88807be8d940 R14: 1ffff1100f7d1c89 R15: ffff88807be8e448
FS:  00007f58adc14380(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f381390b650 CR3: 0000000027798000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <TASK>
 lock_acquire+0x1e3/0x530 kernel/locking/lockdep.c:5753
 __might_fault+0xc1/0x120 mm/memory.c:5955
 _copy_to_iter+0x108/0x1cf0 lib/iov_iter.c:185
 __skb_datagram_iter+0xd4/0x780 net/core/datagram.c:420
 skb_copy_datagram_iter+0xc1/0x220 net/core/datagram.c:546
 skb_copy_datagram_msg include/linux/skbuff.h:3960 [inline]
 __unix_dgram_recvmsg+0x7ec/0x12c0 net/unix/af_unix.c:2429
 sock_recvmsg_nosec net/socket.c:1044 [inline]
 sock_recvmsg net/socket.c:1066 [inline]
 sock_read_iter+0x3ab/0x500 net/socket.c:1136
 call_read_iter include/linux/fs.h:2014 [inline]
 new_sync_read fs/read_write.c:389 [inline]
 vfs_read+0x78b/0xb00 fs/read_write.c:470
 ksys_read+0x1a0/0x2c0 fs/read_write.c:613
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x45/0x110 arch/x86/entry/common.c:82
 entry_SYSCALL_64_after_hwframe+0x63/0x6b
RIP: 0033:0x7f58add68b6a
Code: 00 3d 00 00 41 00 75 0d 50 48 8d 3d 2d 08 0a 00 e8 ea 7d 01 00 31 c0 e9 07 ff ff ff 64 8b 04 25 18 00 00 00 85 c0 75 1b 0f 05 <48> 3d 00 f0 ff ff 76 6c 48 8b 15 8f a2 0d 00 f7 d8 64 89 02 48 83
RSP: 002b:00007ffeaaa705f8 EFLAGS: 00000246 ORIG_RAX: 0000000000000000
RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 00007f58add68b6a
RDX: 00000000000000ff RSI: 000055fab1e79950 RDI: 0000000000000000
RBP: 000055fab1e79910 R08: 0000000000000001 R09: 0000000000000000
R10: 00007f58adf073a3 R11: 0000000000000246 R12: 000055fab1e799ac
R13: 000055fab1e79950 R14: 0000000000000000 R15: 00007f58adf45a80
 </TASK>
INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 1.815 msecs